test: Fix bug: wrong field was being used for CRC32

src/extra_fields/zipinfo_utf8.rs

@@ -13,9 +13,9 @@ pub struct UnicodeExtraField {
 
 impl UnicodeExtraField {
     /// Verifies the checksum and returns the content.
-    pub fn unwrap_valid(self) -> ZipResult<Box<[u8]>> {
+    pub fn unwrap_valid(self, ascii_field: &[u8]) -> ZipResult<Box<[u8]>> {
         let mut crc32 = crc32fast::Hasher::new();
-        crc32.update(&self.content);
+        crc32.update(ascii_field);
         let actual_crc32 = crc32.finalize();
         if self.crc32 != actual_crc32 {
             return Err(ZipError::InvalidArchive(

src/read.rs

@@ -1285,7 +1285,7 @@ pub(crate) fn parse_single_extra_field<R: Read>(
             // APPNOTE 4.6.8 and https://libzip.org/specifications/extrafld.txt
             file.file_comment = String::from_utf8(
                 UnicodeExtraField::try_from_reader(reader, len)?
-                    .unwrap_valid()?
+                    .unwrap_valid(file.file_comment.as_bytes())?
                     .into_vec(),
             )?
             .into();
@@ -1293,7 +1293,8 @@ pub(crate) fn parse_single_extra_field<R: Read>(
         0x7075 => {
             // Info-ZIP Unicode Path Extra Field
             // APPNOTE 4.6.9 and https://libzip.org/specifications/extrafld.txt
-            file.file_name_raw = UnicodeExtraField::try_from_reader(reader, len)?.unwrap_valid()?;
+            file.file_name_raw = UnicodeExtraField::try_from_reader(reader, len)?
+                .unwrap_valid(&file.file_name_raw)?;
             file.file_name =
                 String::from_utf8(file.file_name_raw.clone().into_vec())?.into_boxed_str();
             file.is_utf8 = true;

src/write.rs

@@ -2584,14 +2584,13 @@ mod test {
 
     #[test]
     #[cfg(not(feature = "unreserved"))]
-    fn test_fuzz_crash_2024_06_13() -> ZipResult<()> {
+    fn test_invalid_extra_data_unreserved() {
         use crate::write::ExtendedFileOptions;
         let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
-        writer.set_flush_on_finish_file(false);
         let options = FileOptions {
             compression_method: Stored,
             compression_level: None,
-            last_modified_time: DateTime::from_date_and_time(2021, 8, 8, 1, 0, 29)?,
+            last_modified_time: DateTime::from_date_and_time(2021, 8, 8, 1, 0, 29).unwrap(),
             permissions: None,
             large_file: true,
             encrypt_with: None,
@@ -2605,28 +2604,7 @@ mod test {
             alignment: 4103,
             ..Default::default()
         };
-        writer.start_file_from_path("", options)?;
-        let finished = writer.finish_into_readable()?;
-        let inner = finished.into_inner();
-        writer = ZipWriter::new_append(inner)?;
-        let options = FileOptions {
-            compression_method: Stored,
-            compression_level: None,
-            last_modified_time: DateTime::default(),
-            permissions: None,
-            large_file: false,
-            encrypt_with: None,
-            extended_options: ExtendedFileOptions {
-                extra_data: vec![].into(),
-                central_extra_data: vec![].into(),
-            },
-            alignment: 0,
-            ..Default::default()
-        };
-        writer.start_file_from_path("", options)?;
-        writer.shallow_copy_file_from_path("", "")?;
-        let _ = writer.finish_into_readable()?;
-        Ok(())
+        assert!(writer.start_file_from_path("", options).is_err());
     }
 
     #[cfg(feature = "deflate64")]